Drier.



W. M. SCHWARTZ & A. M. SGHREUDER.

l DRIER.

APPLICATION FILED AUG. 3], 1911. 1,010,322. Patented Nov. 28, 1911.

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DRIBR. APPLIOATIONI'ILED AUG. 3], 1911. 1,010,322, Patented Nov. 28, 1911.

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UNITED sTATEs PATENT oEErcE.

WALTER M. SCHWARTZ AND ANDREW M. SCHREUDER, 0F PHILADELPHIA, PENNSYL- VANIA, ASSIGNORS TO THE PHILADELPHIA TEXTILE MACHINERY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION 0F PENNSYLVANIA.

DBIER.

Specification of Letters Patent.

Patented Nov. 28, 1911.

Application led August 31, 1911. Serial No. 647,049.

To all whom it may concern:

Be it known that we, WALTER M. SCHWARTZ and ANDREW M; SCHREUDER, citizens of the United States, residing in Philadelphia, county of Philadelphia, State of Pennsylvania, have invented certain Improvements in Driers, of which the following is a specication.

Our invention relates to certain improvements in apparatus for drying cotton and similar material, which is conveyed through a chamber, or aseries of chambers, by endless belts; the material dropping from one belt to the other, until it is in proper condition to be removed from the apparatus.

One object of our invention is to construct a drier having three distinct conveying belts, so that the air will circulate through the material in a more perfect manner than heretofore.

A still further object is to arrange -the return runs of one belt in close proximity to the carrying run of another belt, so that the return run will tend to keep the material from being carried away from the conveying belt.

In apparatus of this type, it has been the usual practice to allow the air to circulate from the top down through the material carried by the three belts; consequently, the material on the lower belt was subjected, more or less, to the action of moist air and as this was the last belt of the series, the material was not in the best possible condition. By our invention the upper and lower layers of material are subjected to air as it comes directly from the heating compartment and the middle section is subjected to a current of air from above, as well as from below.

In the accompanying drawings z-Figure 1, is a longitudinal, sectional, diagrammatic view, illustrating a drier made in accordance with our invention; and, Fig. 2, is a transverse sectional view on the line 2-2, Fig. 1.

A is the casing, quadrangular in cross section, and made of any material desired. This casing is divided into two longitudinal compartments a and a'.' The compartment a contains the conveying mechanism and the compartment a is the heating chamber. These compartments maybe divided into as many sections, as desired, by transverse partitions.

v paratus,

The longitudinal partition A', which divides the casing into two compartments, extends from the floor to the roof of the struc ture, and at intervals, in this partition are circular openings b. In each opening is mounted a fan B, carried by a shaft B', adapted to bearings b located, in the present instance, on the exterior of the casing. The fan shafts B' are driven in any suitable manner. There is a flange b2 of the ordina-ry construction, which surrounds the fan, as indicated in Fig. 2.

In the partition above the fan is an opening c and in the lower end of the partition is an opening c', formin communication between the heating cham er and the conveying chamber.

In the conveyin chamber A are three endless conveying elts D, D', D2, which pass around drums d at each end of the apas clearly shown in Fig. 1.` These conveyer belts are supported on rails c formed, in the present inst-ance, of channel bars secured to the walls of the casing. The belts may be made of wire gauze, slats, or other perforated material, so as to provide for the free circulation of air therethrough.

It will be noticed that the carrying run i of the upper upper opening c in the partition and the fan opening Z) and the carrying run 2 of the lower belt D2 is between the opening c', at the bottom of the partition, and the fan opening b, so that the air, as it circulates, is drawn into the heating chamber by the action of the fan, as indicated by arrows, and returns through the openings c, 0'; being drawn through the carrying runs i and 2 of the belts D, D2 respectively.

The airis drawn down through the carrying run of the belt D and drawn up through the carrying run of the 4belt D2 so that the material, on the carrying runs of both belts, is subjected to the air as it comes directly from the heating chamber. The carrying run z" of the belt D' is located at a point directly under the fan shaft and the air as it circulates through the material on the upper belt and through` the material on thelower belt, passes over the surface of the material on the carrying run i of the belt D', while the air as it circulates through the material on the lower belt, contacts with the under side of the carrying run 0f the belt D is located between thedividing the casing belt D, as said air is drawn by the fan into the heating chamber to be dried and reheated. Thus the material on the upper and lower b'elts is subjected to the direct action of the heated air as it comes from the heating chamber, while the material on the intermediate belt is subjected to air, which is not overcharged with moisture, so that the material is more readily dried than where the air circulates in one direction only.

It will be noticedon referring to Fig. 2, that the return' run a, of the belt D is in close proximity to the carrying run i of the belt D', and the return run h of the belt D is in close proximity to the carrying run 2 of the belt D2. If the material should be lifted o' the carrying run it-will beheld from passing away from t-he belt by the return run of the belt directly above, and consequently a more rapid circulation vof air can be maintained.

In the heating compartment A are the steam pipes F, F', arranged in any manner desired, so that the air will be thoroughly heated as it passes through the pipes in the circulation through the apparatus.

In some instances the direction of the currents of air may be reversed, the air rst passing the material on the belt D and then through the material on the belts D, D2, but we prefer' to direct the currents of air as indicated in Fig. 2.

1. The combination in -a. drying-apparatus, of a casing,

a longitudinal partition into two sections,l heating means in one section and three endless conveying beltsin the other section, said partition 'having an opening at its upper end and at its lower end and having an intermediate driven fan opening, a fan therevthe return run Vof the the return runs will prevent ment of the materlalcarried in, to 'circulate the air in the heatingchamber as well' as in the conveying chamber, the carrying -run of Ythe upper belt being located between the upper opening of the partition and the fan, and the carrying run of the lower belt being located between the lower opening and the fan opening, thevcarlcompartment, three endless belt conveyers 1n t-he other compartment, said partition having an opening at its its lower end and having an intermediate driven fan opening, a fan therein, to circulate air through the heating compartment and through the conveying compartment, upper conveyer being the carrying run of 1n close proximity to the' intermediate conveyer, and the return run of the intermediate conveyer being in close proximity to the carrying'run of the lower e'onveyer, s0 that the air, as it passes down through the upper conveyer and up through the lower eonveyer, will ltravel on each side of the intermediate conveyer, and

the displaceon the two lower conveyers.

In testimony whereof, we have signed our names to this specification, in the presence of two subscribing witnesses.

*WALTER M. SCHWARTZ. ANDREW M. SCHREUDER.

Witnessesz. i

WM. E. SHUPE, WM. A. BARR.

upper end and atv 

